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SUMMARY:Seismic Constraints on the Temperature and Composition of Earth's 
 Interior: Some Open Questions - Fabio Cammarano\, Roma 3 University
DTSTART:20250528T130000Z
DTEND:20250528T140000Z
UID:TALK231892@talks.cam.ac.uk
CONTACT:Adriano Gualandi
DESCRIPTION:Despite major advances in the quantity and quality of seismic 
 data\, several first-order questions about the thermal and compositional s
 tructure of the Earth's interior remain unresolved. This is due in part to
  the uncertain relationship between seismic velocities and physical proper
 ties such as temperature and composition\, but more critically\, to the li
 mited resolving power of seismic observations and the lack of a clear phys
 ical meaning of seismic models. \n\nIn this talk\, I will review several e
 fforts made over the years to address two fundamental questions through an
  interdisciplinary approach: a) Is the Earth's mantle well-mixed\, and to 
 what extent? b) What do we know about the bulk composition\, thermal state
  (and thickness) of the continental lithosphere? \n\nThe first question wi
 ll involve a review of seismic constraints on the spherically averaged str
 ucture of the Earth's mantle\, focusing on current insights into thermal a
 nd compositional variations with depth. Given the complexity of this topic
 \, I will highlight select studies and findings from my past research that
  help illuminate these issues\, while leaving open areas of ongoing debate
  and uncertainty.\n\nFor addressing the second question\, I will focus on 
 recent advancements in imaging the continental lithosphere\, with a partic
 ular focus on the crustal portion. I will discuss techniques such as ambie
 nt noise analysis to measure the dispersion and attenuation of short-perio
 d surface waves\, along with receiver function analysis\, to refine our un
 derstanding of the composition and thermal state of the lithosphere. Final
 ly\, I will explore efforts to develop thermochemical models of the Earth'
 s crust that align with these seismic observations.
LOCATION:Wolfson Lecture Theatre
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